Adjective
jiggly (comparative jigglier, superlative jiggliest)
that jiggles
Remember that when cheesecake comes out of the oven, it is still a little bit jiggly. Source: Internet
Start testing after 1 1/2 hours, prodding brisket with your finger to see how it responds: the meat should become soft and balloon-like, almost jiggly. Source: Internet